You've probably heard the meteorologist tell you the "heat index" or the "feels like" temperature, but what does that mean?

Sometimes the temperature outside feels warmer than it is, and there's a reason. Here's a breakdown of the heat index.

The heat index is a measure of how hot it feels, and it could be 20 to 30 degrees higher than the temperature on the thermometer. The heat index is a factor of air temperature and humidity ...

With a heat wave causing excessive heat warnings in Delaware, you'll hear a lot about the heat index this week. What to know ...

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Basically, when the body sweats, the perspiration evaporates, cooling the body. When the humidity is high, the sweat doesn't evaporate as quickly and the body doesn't cool itself as well. Therefore, ...

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In order to calculate the heat index, you need to compare the dew point (or relative humidity) values and the actual air temperature. Below is a chart of some of these values: ...

The heat index is measured using a multiple regression analysis that uses the actual temperature and humidity to produce a number that is more representative of how hot it feels outside.